{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T12:50:45Z","timestamp":1775825445917,"version":"3.50.1"},"reference-count":47,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2022,8,25]],"date-time":"2022-08-25T00:00:00Z","timestamp":1661385600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science of China","award":["41961065"],"award-info":[{"award-number":["41961065"]}]},{"name":"National Natural Science of China","award":["2019GXNSFGA245001"],"award-info":[{"award-number":["2019GXNSFGA245001"]}]},{"name":"National Natural Science of China","award":["Guike AD19254002"],"award-info":[{"award-number":["Guike AD19254002"]}]},{"name":"Guangxi Natural Science Foundation for Innovation Research Team","award":["41961065"],"award-info":[{"award-number":["41961065"]}]},{"name":"Guangxi Natural Science Foundation for Innovation Research Team","award":["2019GXNSFGA245001"],"award-info":[{"award-number":["2019GXNSFGA245001"]}]},{"name":"Guangxi Natural Science Foundation for Innovation Research Team","award":["Guike AD19254002"],"award-info":[{"award-number":["Guike AD19254002"]}]},{"name":"Guangxi Innovative Development Grand Program","award":["41961065"],"award-info":[{"award-number":["41961065"]}]},{"name":"Guangxi Innovative Development Grand Program","award":["2019GXNSFGA245001"],"award-info":[{"award-number":["2019GXNSFGA245001"]}]},{"name":"Guangxi Innovative Development Grand Program","award":["Guike AD19254002"],"award-info":[{"award-number":["Guike AD19254002"]}]},{"name":"BaGuiScholars program of Guangxi","award":["41961065"],"award-info":[{"award-number":["41961065"]}]},{"name":"BaGuiScholars program of Guangxi","award":["2019GXNSFGA245001"],"award-info":[{"award-number":["2019GXNSFGA245001"]}]},{"name":"BaGuiScholars program of Guangxi","award":["Guike AD19254002"],"award-info":[{"award-number":["Guike AD19254002"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The fisheye camera, with its large viewing angle, can acquire more spatial information in one shot and is widely used in many fields. However, a fisheye image contains large distortion, resulting in that many scholars have investigated its accuracy of orthorectification, i.e., generation of digital orthophoto map (DOM). This paper presents an orthorectification method, which first determines the transformation relationship between the fisheye image points and the perspective projection points according to the equidistant projection model, i.e., determines the spherical distortion of the fisheye image; then introduces the transformation relationship and the fisheye camera distortion model into the collinearity equation to derive the fisheye image orthorectification model. To verify the proposed method, high accuracy of the fisheye camera 3D calibration field is established to obtain the interior and exterior orientation parameters (IOPs\/EOPs) and distortion parameters of the fisheye lens. Three experiments are used to verify the proposed orthorectification method. The root mean square errors (RMSEs) of the three DOMs are averagely 0.003 m, 0.29 m, and 0.61 m, respectively. The experimental results demonstrate that the proposed method is correct and effective.<\/jats:p>","DOI":"10.3390\/rs14174175","type":"journal-article","created":{"date-parts":[[2022,8,26]],"date-time":"2022-08-26T02:04:32Z","timestamp":1661479472000},"page":"4175","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":84,"title":["Orthorectification of Fisheye Image under Equidistant Projection Model"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8295-0496","authenticated-orcid":false,"given":"Guoqing","family":"Zhou","sequence":"first","affiliation":[{"name":"College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China"},{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-6307-7636","authenticated-orcid":false,"given":"Huanxu","family":"Li","sequence":"additional","affiliation":[{"name":"College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China"},{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]},{"given":"Ruhao","family":"Song","sequence":"additional","affiliation":[{"name":"College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China"},{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6205-1992","authenticated-orcid":false,"given":"Qingyang","family":"Wang","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]},{"given":"Jiasheng","family":"Xu","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]},{"given":"Bo","family":"Song","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, No. 12 Jian\u2019gan Road, Guilin 541004, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5163","DOI":"10.1080\/01431160410001705079","article-title":"True orthoimage generation in urban areas with very tall buildings","volume":"25","author":"Zhou","year":"2004","journal-title":"Int. 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